O23 - Infections of genitourinary tract in pregnancy
O23.1 - Infections of bladder in pregnancy
O23.10 - Infections of bladder in pregnancy, unspecified trimester
O23.11 - Infections of bladder in pregnancy, first trimester
O23.12 - Infections of bladder in pregnancy, second trimester
O23.13 - Infections of bladder in pregnancy, third trimester